Reenforced crusher plate



Feb. 25, A1930 c. E. HARRISON 1,748,879

REENFORCED cRUsHER' YPLATE Filed July 22. .1925 2 Sheets-Sheet l rn Il ||||I Il Patented Feb. 25, 1930 PATENT omer.

CLIFFORD :EARL HARRISON, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR T0 .AMERICAN ENGINEERING COMPANY, PORATION 0F PENNSYLVANIA l 0F PHILADELPHIA, PENNSYLVANIA, A COR- REENFORCED CBUSHER PLATE .Application med J'uly 22, 1925. Serial No. 45,831.

My invention relates to stokers, having particular relation to ash discharging means.

Heretofore, considerable diiiculty has been experienced with Crusher plates, inasmuch as they are continuousl breaking under load conditions and also ture changes incident to the cooling of clinker formations. As a result, frequent shut downs are necessary in order to replace the broken plates. An object of my invention, therefore, is to provide a Crusher plate which shall avoid not only the above undesirable results but which shall be further characterized by increased stren h and by continued usefulness after brea ing or cracking.

Another object of my invention is to provide a Crusher plate which shall in connection with the crusher rolls cause a maximum ripping and tearing of the ashes; and which shall prevent the clinkers from rollin around on top of the crusher rolls, by hol ing said clinkers firmly in position to be crushed, whereby 'complete and eective grinding of the clinkers and `ashes under all conditions of operation may obtain.

With these and other objects and applications inmind, my invention further consists in the details of construgtion and operation and arrangement hereinafter described and claimed and illustrated in the accompanying drawings, wherein Fig. 1, is a transverse sectional view of an ash pocket and associated Crusher mechanism embodying my invention;

Figs. 2 and 3 are front and side elevational iiews respectively, of the Crusher plate of Referring particularly to Fig. l, an ash pocket 1 of a furnace construction 2 is provided with side walls 3 and 4 and a pair of rotarycrushers 5 and 6, the latter being of usual design. r The .side walls 3 and 4 may include Crusher plates 7 and 8 which are ivoted on shafts 9 and 10 carried by brac ets 11 and 12 respectively. The crusher plates ue to tempera- 7 and 8 are substantially identical, so that the latter only will be described in detail.

As illustrated in Figs. 2 and 3, inclusive, the crusher plate 8 may comprise a substantiall flat elongated member having a front wor 'ng 4face 13 and a rear face 14. An outer end 15 is provided with an enlarged portion '16, which extends across the width of the crusher plate 8. A rod 17', which is opera` tively secured to an operating link 18, may be supported in bearings 19 and 21 extending from the rear face 14 of the crusher plate 8. Each of said bearings is provided with a slotted end 22 adapted to receive the rod 17 and it is provided with aligned .perforations 23 and 24 for the reception of a retaining cotter pin 25.

A pair of webs 26 and 27 extend upwardly fromthe bearings 19 and 21 and terminate in spaced sections 28 and 29 adapted to abut against a member 31 constitut1ng one part of a two-part bearing 32, as will presently appear. The member 31 may be secured in position by bolts 33 extending therefrom through perforations 34 in the adjacent sections 28 and 29 of the crushr plate 8. The member 31 is provided with a curved portion 35 adapted to engage the periphery of the shaft 10. An upper end portion 36 of the Crusher plate .8, constituting the other part of the two-part bearing 32, is so curved as to engage the remaining portion of the periphery of the pivot shaft 10. Friction between the shaft 10 and the curved end portion 36 of thev Crusher plate 8 is reduced to a minimum by recessing said curved end portion as lshown in the drawing, so that the crusher plate 8 is supported on pairs of spaced ianges,l

37 and 38 only. The lower end portions of the sections 28 and 29 are interconnected by a transversely extending web 39 which is 1ntersected by a central, vertically extending web 41. t

As above noted, my invention contemplates means whereby the Crusher plates 8 and 9 j Webs 26, 4l and 2T, respectively. Should an increase in strength and rigidity be required for the upper end of the crusher plate 8, the central rod 41 may be extended as illustrated in Fig. 2. T-he reenforcing rods may be coated with tin prior to the molding operation, so that a clean surface is presented to the metal. g

Practical experience has shown that the effect of the several reenforcing bars is to more than double the strength of the crusher plate 8. Moreover, should the load on the crusher plate 8 increase until it fractures or should it crack during the chilling of the clinker formation the broken parts of the crusher plate would `be rigidly held together by said reenforcing bars, with the result that an immediate shut down of the furnace is not necessary and the life of the crusher plate is lengthened accordingly.

Myv invention further contemplates a working face for the crusher plates 7 and 8 which vshall secure complete and effective grinding of the ashes and c linkers. Heretofore, considerable difficulty has been experienced as a result of the tendency for the clinkers to roll around on the top of the crusher rollsr5 and 6, also the clinkers would tend to pass between a crusher roll and its adjacent plate Without being completely crushed. Accordingly, I provide on the working face 13 of each of the crusher plates a plurality of vertically extending ribs 47 of triangular cross section. The ribs are of maximum cross section at the lower end 15 of the crusher plate and taper to an apex adjacent to the upper end 36 thereof. The gripping of the elinkers is facilitated by means of a plurality of transversely extending grooves 48 which form teeth 49. |The teeth 49 may be positioned substantiallyy centrally of each rib 47, having upper and lower non-serrated surfaces 51 and 52, respectively.

Under conditions of operation, the lower end portions 15, 15 of the crusher plates 7 and 8 are positioned immediately adjacent to the rotary Crushers 5 and 6, respectively. lVhen the latter are actuated, the clinkers and ashes are subjected to a ripping and tearing action which results from being forced against the adjacent toothed working faces of the crusher plates 'i' and 8. The teeth 49 -may be considered as functioning similar to a claw, since they hold the clinkers firmly in a position to be crushed by the rolls 5 and 6.

Hence, there is no opportunity for the elinkers to move around freely on the upper side of the crusher rolls 5 and 6.

lVhile I have shown only oneI embodiment of my invention, for the pur ose of describing the same and illustrating its yprinciples of ity of reenforcing webs on one side t ereof,`

and a corresponding plurality of reenforcing elements imbedded in said latein alignment with said webs, respectively.

2. In a device of the class described', a crusher plate having an enlarged outer end portion, a plurality of spaced webs extending therefrom toward the remaining endof said plate, a reenforcing element individual to each web and positioned in alignment therewith, a reenforcing element for said outer end portion, and a reenforcing element eX- tending transversely of said webelements and positioned intermediate the ends thereof.

3. A. swinging crusher plate having front and rear faces, longitudinally and transversely extending webs on the rear face of said plate, a reenforcing elementimbedded in one v positioned in alignment with the other of said webs, said elements constituting a supporting fra ine-work tendingr to hold together the crusher plate upon the fracture thereof, the front face of said plate having a plurality of serrated ribs forming'teeth.

A plate having an enlarged outer end portion, 'a plurality of spaced webs extending therefrom toward the other end of said plate, a leenforcing element individual to each web and positioned in alignment therewith, a reenforcing element for said outer end portion, and a reenforcing element extending transversely of said web elements positioned intermediate the ends thereof, said elements constituting a supporting framework for said plate holding together the same upon the fracouter end portion, a plurality of spaced websl extending therefrom toward the remaining end portion, a reenforcing element positioned 1n alignment with each web, a reenforcmg f element for said outer end portion, a transversely extending web positioned intermediate the ends of said plate, a reenforcing element positioned in alignment with said last-mentioned web, said reenforoing elements constituting a supporting framework, and a plurality of ribs provided with grooves to form teeth.

7. A Crusher plate having front and rear faces, singularly disposed webs 'extending from said rear face, a reenforcing element imbedded in one of said Webs, a second reenforcing element positioned in alignment with the other of said webs but imbedded substantially in said Crusher plate, and a serrated triangular rib extending from the front faceof said Crusher plate.

8. In combination, a Crusher plate` having' front and rear faces, a pair of spaced webs terminating in enlarged spaced end sections, a web positioned intermediate said first-mentioned Webs and extending between said spaced end sections, a reenforcing element positioned 4in alignment with each of said webs, a web extending transversely of said first-mentioned webs, and a` reenforcing element positioned in alignment therewith, said elements constituting a supporting frame# Vwork for holding together the Crusher plate upon the fracture thereof, said front face being formed witha plurality of teeth.

9. A swinging Crusher plate having an enlarged end portion, a pair of webs extending therefrom and 'terminating in enlarged sections adjacent to the other end of said plate, a web intermediate said first-mentioned webs f and extending between said spaced end-sections, a web extending transversely of said pair of webs, reenforeing elements positioned in substantial alignment of each of said webs, said elements constituting a supporting framework, and a plurality of ribs on said plate serrated to form teeth.

10. In combination, a crusher plate having front and rear faces, one end of said plate being enlarged, a pair of webs extending from said enlarged portion and terminating in enlarged end sections adjacent to theA other end of said plate, an intermediate web positioned between said pair of webs and extending between said enlarged end sections, a fourth web extending transversely of said pair of webs, a reenforcing element imbedded in said fourth web, and reenforcing elements positioned in alignment with the.other webs, said elements constituting a supporting framework, said pair of webs being formed to constitute elements of a bearing.

11. A Crusher plate adapted to constitute at least a portion of one wall of an ash pocket, said Crusher plate having a plurality of serrated ribs on the working face thereof, and sets of reenforcing elements imbedded in said plate in different planes, said elements constituting a supporting framework.

plate, an intermediate web positioned be-y tween said pair of webs and extending;v between said enlarged end sections, and a fourth web .extending transversely of said pair of webs, said pair of webs being formed to constitute elements of a bearin CLIFFORD EARLgHARRISON. 

